Dust-removing device



Jan. 14, 1941. I BELANGYER 2,228,743

DUST-REMOVING DEVICE Filed Dec.- 6, 1939 Patented Jan. 14, 1941 PATENT OFFICE 2,228,743 DUST-REMOVING DEVICE Louis J. Belanger, Graniteville, Vt., assignor to Rock of Ages Corporation, Barre, Vt., a corporation of Vermont Application December 6, 1939, Serial No. 307,869

2 Claims.

This invention relates to a device for laying and removing dust during the operation of a rock drill. The invention relates particularly to an improved device by which a mixed jet of air and water may be conveniently directed to the point at which a rock drill engages a piece of stone, the device being usable to equal advantage either in a shed or in a quarry.

A further object of my invention is to provide a construction which in part loosely embraces a drill, thus conveniently keeping the drill and the dust-removing device in operative relation.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a side elevation of my improved dustremoving device;

Fig. 2 is a plan view, looking in the direction of the arrow 2 in Fig. 1; and

Fig. 3 is a bottom view, looking in the direction of the arrow 3 in Fig. 1.

Referring to Fig. 1, I have shown a drill D operating on a piece of stone S. My improved dustremoving device comprises a base I 0 having a relatively large central opening I I through which the drill D loosely extends.

The base Ill is preferably elongated at one side as indicated at l2 to provide increased support for the device, and is also provided with a relatively small straight inclined passage M which extends through the side wall of the opening II to a point near the lower face of the device.

A tubular member I6 is formed with or joined to the base I0 and extends upward therefrom in an inclined direction, as clearly shown in Fig. 1. A branch pipe [8 is connected at one side to the tubular member [6 and preferably forms an acute angle therewith, as shown in Figs. 2 and 3. A rubber hose 30 may be connected to the outer end of the tubular member I6 and a smaller hose 36 I to the outer end of the pipe I8.

The pipe 36 is supplied with water under pressure from any suitable source and the pipe 30 is similarly supplied with air under pressure. The air and water are intimately commingled in the space 33 within the member l6, and the mixture of air and water is forcibly projected through the relatively small straight passage M to the interior of the opening I I.

This mixed jet is very effective for laying the dust arising from the drilling operation and for moving the dust and chips from the drilled recess.

It has heretofore been proposed to use a jet of water in rock drilling operations, but the use of mixed air and water as described herein possesses important advantages thereover, and particularly in the saving in water due to the use of air.

Where water alone is used, the stream of water must be ejected at relatively high speed in order to keep the dust and chips washed away from the drill. With my improved device, however, the rate of movement of the water is largely due to the air pressure, and only a relatively small amount of water need be mixed with the rapidly moving stream of air to produce the desired effect.

This not only conserves water but also reduces the amount of water flowing over and away from the stone, thus avoiding the very wet operative conditions otherwise encountered. The straight inclined passage l4 also directs the stream of air and water at the most effective angle for effective dust removal.

Any suitable shield may be used to prevent water from splashing the operator.

Air for operating the device may conveniently be taken from the exhaust of the air drill with which the device is used. 7

The annular shape of the base portion In retains the dust removing device in assembled relation with the drill, while permitting free operation of the drill and removal thereof from the rock whenever desired.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A dust-removing device comprising a base having a drill-receiving opening therethrough and having a small straight inclined passage extending through one side of said base to a point in the side wall of said opening near the stone-engaging face of said base, and means to supply a mixed stream of air and water under pressure to said inclined passsage, and said base being elongated at each side of said inclined passage to provide increased supporting surface for said device.

2. A dust-removing device comprising a base having a drill-receiving opening therethrough and having a small straight inclined passage extending through one side of said base to a point at the lower edge of the side wall of said opening and closely adjacent the stone-engaging face of said base, a pipe connecting into the of said straight inclined passage, a branch pipe connecting into said inclined passage, and means to supply air and separate means to supply water, both under pressure, to said two pipes, whereby a stream of aerated water is supplied through said 5 inclined passage.

LOUIS J. BELANGER.

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